454 
Ulexine  and  Cytisine 
Am.  Jour.  Pharm 
Sept.,  1890. 
These  compounds  are  regarded  by  them  as  desmotropic  to  each 
other  and  having  the  following  structural  formulae  : — 
HBrC 
CO 
COH 
BrC 
and 
Dr.  Hesse  is  disposed  to  view  these  substances  as  identical  in 
structure,  but  isomeric  from  a  stereochemical  point  of  view  as  shown 
below : 
COH 
and 
CO  \    J  HOC 
in  much  the  same  manner  that  Skraup  and  Wiirstl  assume  quinine, 
quinidine  fconchinine)  and  quinicine  to  be.  That  quinine,  as  well 
as  cinchonidine,  each  contains  at  least  one  double  carbon  bond  is 
shown  by  the  occurrence  of  hydroquinine  and  hydrocinchonidine  ; 
but  it  remains  to  be  determined  whether  the  above-mentioned 
relations  between  quinine  and  homoquinine,  as  well  as  cinchonidine 
and  homocinchonidine,  would  be  satisfactorily  accounted  for  by  the 
assumption  of  a  change  in  the  situation  of  that  bond. 
ULEXINE  AND  CYTISINE.1 
By  A.  W.  Gerrard  and  W.  H.  Symons,  Pharmaceutical  Chemists. 
Professor  Kobert  has  drawn  attention  to  what  he  considers  the 
close  resemblance  between  cytisine,  the  alkaloid  of  C.  Laburnum,  as 
described  by  Husemann  and  Marme,  and  ulexine,  the  alkaloid  of 
Ulex  europceus,  described  by  us,  and  he  appears  to  think  that  if 
analyzed  by  the  same  hands  these  two  substances  would  be  found 
to  be  identical.  Will  you  therefore  allow  us  a  little  space  to 
enumerate  some  physical  differences  which,  if  the  properties  assigned 
to  cytisine  are  correct,  alone  prove  them  to  be  separate  bodies,  even 
if  the  chemical  evidence  is  not  considered  sufficient  to  show  them 
to  be  distinct  alkaloids. 
1  From  Phar.  Jour,  and  Trans.,  June  14,  1890,  p.  1017. 
